CVE-2018-1712 in API Connect
Summary
by MITRE
IBM API Connect's Developer Portal 5.0.0.0 through 5.0.8.3 is vulnerable to Server Side Request Forgery. An attacker, using specially crafted input parameters can trick the server into making potentially malicious calls within the trusted network. IBM X-Force ID: 146370.
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Analysis
by VulDB Data Team • 05/02/2023
The vulnerability identified as CVE-2018-1712 affects IBM API Connect's Developer Portal version 5.0.0.0 through 5.0.8.3, representing a critical server-side request forgery flaw that exposes the system to unauthorized internal network access. This vulnerability stems from insufficient input validation mechanisms within the portal's request handling processes, allowing malicious actors to manipulate parameter values that are subsequently processed by the server. The flaw enables attackers to construct requests that appear legitimate to internal systems while actually directing the server to initiate connections to arbitrary internal endpoints. Such an attack vector fundamentally undermines the network segmentation principles that protect internal infrastructure from external threats.
The technical implementation of this vulnerability involves the improper handling of user-supplied input parameters within the Developer Portal's backend services. When legitimate users submit requests containing crafted parameters, the system fails to properly sanitize or validate these inputs before using them in subsequent network operations. This weakness creates an environment where attacker-controlled data can be seamlessly integrated into internal network requests, effectively bypassing traditional network security controls. The vulnerability operates at the application layer and leverages the trust relationship between the Developer Portal and internal systems, allowing the server to act as an unwitting proxy for malicious activities.
The operational impact of this vulnerability extends beyond simple data exfiltration, potentially enabling attackers to perform reconnaissance activities within the internal network, access sensitive internal services, and even escalate privileges through lateral movement. Attackers can exploit this flaw to probe internal systems for open ports, identify running services, and gather intelligence about the internal infrastructure. The vulnerability also poses significant risk to organizations that rely on API Connect for managing their developer ecosystems, as it can compromise the integrity of the entire API management platform. This type of attack can result in unauthorized access to internal databases, service endpoints, and potentially lead to further compromise of the broader enterprise infrastructure.
Organizations should implement multiple layers of defense to mitigate this vulnerability, beginning with immediate patching of affected IBM API Connect Developer Portal versions to the latest available releases. Network segmentation strategies should be reinforced with strict firewall rules that limit outbound connections from the Developer Portal to only necessary internal services. Input validation mechanisms must be strengthened throughout the application to ensure all user-supplied parameters are properly sanitized before processing. Additionally, implementing web application firewalls and monitoring for unusual outbound network requests can help detect exploitation attempts. According to CWE-918, this vulnerability maps to Server-Side Request Forgery, while the ATT&CK framework categorizes this as a technique under T1071.004 for Application Layer Protocol: DNS and T1082 for System Information Discovery, highlighting the reconnaissance and lateral movement capabilities that attackers can leverage through this flaw.